What filter is this?

[Methuselah96]

Can anyone help me figure out what filter was used to create this image? I created this image a couple years ago using Gimp, but I can't remember what filter I used. Before the filter was applied, the image was a solid light-green circle with solid white stripes. (I blurred out the text since they're names.) I've gone through all the filters and I can't seem to find a filter that produces the same result.